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Finding the Fourth Proportional to 74,870.64, 103,321.84 and 40,879.82

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Solution

The fourth proportional to 74,870.64, 103,321.84 and 40,879.82 is: 56,414.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,870.64 : 103,321.84 = 40,879.82 : x
  2. Step 2: Convert to fraction form
    74,870.64/103,321.84 = 40,879.82/x
  3. Step 3: Cross multiply
    74,870.64x = 103,321.84 × 40,879.82
  4. Step 4: Simplify right side
    74,870.64x = 4,223,778,221.27
  5. Step 5: Solve for x
    x = 4,223,778,221.27/74,870.64
  6. Step 6: Final answer
    x = 56,414.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.